Reversng mechanism for rotary motors.



PATENTBD MAY 15, 1906.

A. H. TAYLOR. RBVERSING MECHANISM FOR ROTARY MOTORS.

APPLICATION IILED AUG.1,1905.

2 SHEETS-SHEET l.

PATENTED MAY 15, 1906.

v A. H.,TAYLOR. REVERSING MECHANISM FOR ROTARY MOTORS.-

APPLICATION FILED AUG.1,1905.

2 SHEETSSHEET 2 reversing-valve and inner top cylinder-head,

.7 and 8 lead from the piston-chamber 5 upon ALBERT H. TAYLOR,

or nas'ron,

V PENNSYLVANIA, ASSIGNOB. TO THE INGERSOLL-SERGEANT'DRILL COMPANY, OFNEW YORK, N. Y., A

CORPORATION OF- WEST VIRGINIA.

REVERSFNG MEGHANlSM FQR ROTARY MOTORS.

Specification of Letters Patent.

Patented Ma 15, 1906.

Application filed August 1, 1905. Serial No. 272.173.

To all whowt it m/cty concern:

Be it known that I, ALBERT H. TAYLOR, a citizen of the United States,and a resident of Easton, in the county of Northampton and State ofPennsylvania, have invented a new and useful Improvement in ReversingMechanism for Rotary Motors, of which the following is a specificationThe object of my invention is to provide certain improvements inreversing mechanism ior rotary motors in which the movements of thereversing-valve are manually controlled through the medium of a handle,located on the exterior of theQmotor.

This invention is shown herein as applied to a pneumatic motor of therotary-piston type adapted for use as a drill.

A practical embodiment of the invention is represented in the accopanying drawings, in which Figure 1 represents in top plan a rotarypneumatic motor embodying my invention. Fig. 2 is a side view of thesame, portions of the motor being broken away to more clearly show itsinterior arrangement. Fig. 3 is a horizontal section taken in the planeof the line A A of Fig. 2 looking in thedirection of the arrows. Fig. 4is a top plan view of the the valve being at the limit of its rockingmovement in one direction. Fig. 5 is a diagrammatic sectional view takenin the plane of the line B B of Fig. 4. Fig. 6 is a top plan view of thevalve and inner top cylinder-head, the valve being at the limit of itsmovement in the opposite direction; and Fig. 7 is a diagrammatic sectiontaken in the plane of the line C C of Fig. 6.

The body of the pneumatic motor of the rotary-piston type in connectionwith which this invention is shown is denoted by 1, its top and bottomouter cylinder-heads by 2 and 3, and its top inner cylinder-head by 4.The piston-chamber is denoted by 5, and a piston 6, of any well-known orapproved form, is mounted eccentrically therein. Ports opposite sides ofthe point of contact of the piston with the' inner walls of the chamberto vertically-arranged. separated passages 9 and 10 in the wallsof thebody of the motor. Themain motive-fluid inlet is denoted by 11, and a-vertical passage 12 communicates therel also extend through the head 3.

with, which passage 12 is located in the partition-wall between thepassages 9 and 10.-

The inner top cylinder-head 4 of the motor is provided with a port 13therothrough, which is at all times in communication with'the Ports 14and 15 inner top head 4 upon opposite sides of the port 13, the portmain fluid-inlet passage 12.

'14 being at all times in open communication with the passage 9 and t eport 15 being at all times in open communication with the passage 10 inthe body of the motor. Ports 16 '17 extend throu h the top inner head 4,which ports are at al times in alinement with passages 18 19, whichextend: vertically through the body of the motor and are in opencommunication at their ower ends with the interior of the lower outer.cylinder- A rotary valve 20 is mounted on theinner top cylinder-head 4in the space 21 between the inner and outer top cylinder-heads, therotary movement of which valve is limited by a pin-and-slot connection.the slot in the present instance (denoted by 22) being formed in thevalve and the pin 23 being secured in position between the inner andouter top cylinder-heads. A handle 24 for rockin the valve is locatedexterior to the body motor and is provided with a shank 25, whichextends throu h a suitably-arran ed stufling-box 26 in t e outer topcylinderhead, which shank is secured to the valve 20 between the twoheads. This valve 20 is provided with an elongated port 27 thercthroughconcentric with the ports 13 14 15, the length of the port 27 being suchthat when the valve is rocked to the limit of its movement in onedirection the main inletpassage 12 will be brought into opencommunication with the passage 9 through the ports 13 and 14 and wherocked. to the limit of its movement in the other direction the maininlet-passage 12 will be brought into open communication with thepassage 10 through the ports 13 and 15. Thiselongated port 27 is openedentirely through the valve, so as to keep motive-fluid pressure in thespace 21 for holdifig the valve snugly in its seat on the inner top head4. .This valve 20 is further provided with an elongated bridge-port 28in its bottom, which port is concentric with the ports 14 an i 16 and isol the 1 the port 17 when the valve is at the limit or" 5 myself to thisconstruction; but

arran ed to open the port 14 of the passage 9 to the port .16 of theexhaust-passage 18 w ion the valve is at the limit of its movement inone direction and to close communication to the port 16 when the valveis at the limit of its movement in the opposite direction. This valve 20is furthermore provided with an elongated bridge-port 29, which isconcern trio with the ports 15 and 17 and is arranged to open the port15 of the passage 10 to the port 17 of the exhaust-passage 19 when thevalve is at the limit of its movement in one direction and to cut offcommunication to its movement in the opposite direction.

In operation, supposing the valve to be in the positron shown in Fig. 4,the motor will be driven in one'direction with its supply of moeeoeserotary motor, its top and bottom outer cylinder-heads and its top'in'nercylinder-head, a piston-chamber, a rotary piston mounted eccentricallytherein, said cylinder having therein a fluid-lnletpassage, twopiston-passages and two exhaust-passages, oil a-manually-operatedreversing-valve mounted on the inner top cylinder-head arranged to diroot the motive fluid from the fluideinlet passage to one of thepiston-passages and from the other piston-passage to one of theexhaust-passages. i

2. The combination with the cylinder of a rotary motor, its top andbottom outer cylintier-heads and its top inner cylindenhcad, apiston-chamber, a rotary piston mounted eccentrically therein, saidcylinder having therein a fluid-inlet passage, two piston-pastive fluidpassing from the passage 12 through the ports 13 14, passage 9, and port7, to the piston-chamber 5 on one side of the piston, the other side ofthe piston being open to the external atmosphere through port 8, passage10, ports 15, 29, and 17, and exhaust 19. W hen it is desired to reversethe motion of the motor, the valve may be turned into the position shownin Fig. 6, when the motive fluid will be supplied to the pistoncha1nherthrough the passage 12, port 15, passage 10, and port 8, the other sideof the pistoncharnoer at the same time being open to the externalatmosphere through the port 7, pas- 9, ports: 14 28 16, and passage 18.

It'will be seen that by mounting the valve between the inner and. outertop cylinderheads I am enabled to provide a very simple and convenientarrangement without the necessity of producing a complicatedmotorcylinder, and, furthermore, that the parts are readily accessibleand are extremelysimple.

While I have shown this mechanism in connection with a pneumatic motorof the rotary-piston type adapted for use as a drill, it is to beunderstood that I do no Wish to limit sages, and two exhaust-passagescommunieating with the interior of the bottom outer cylindenhead, of amanually-operated reversingwalve mounted on the top inner cylinder-headarranyed to direct the motive fluid from the ilui --inlet passage to oneof the pistoinpassages and from the other pistonpassage to one of theexhaust-passages.

3, The combination with the cylinder of a rotary'niotor, its top andbottom outer cylindenheads and its top inner cylinder-head, apiston-chamber, a rotary piston mounted eccentrically therein, saideylinder having a fluid-inlet passage, two pistornpassages and twoexhaust-passages, of a manually-operated reversingwalve having a portfor opening the fluirhinlet passage to the one or the other of thepistowpassages and also having two bridge-ports for opening the one orthe other of the pfstoinpassages to the one or the other of the twoexhaust-passages.

In testimony that I claim the "foregoing as my invention 1 ave signed myname, in presence of two witnesses, this 28th day of July, 1905.

ALBERT ll. TAYLOR. ilv itnesses:

l Vhat I claim as my invention is 1 v 1 l. Th combination with thecylinder of a i t When RAYMOND,

I Rnssner. ii. WiLnnmr.

